Means for controlling the feed of gasoline engines



Dec. 11, 1928. 1,694,469

C. H. HAPGOOD MEANS FOR CONTROLLING THE FEED 0F GASOLINE ENGINES Filed March 30, 1926 Patented Dec. 11, 1928.

rr rras Le a CYRUSHOWABD iinreoonoi Nesta-"3r, new JERSEY, ASSIGNOR To THE nnkt' avan snranaron cor/tra n;- or vnw YQRK, my, a CORPORATION or NEW JERSEY..

eans Eon oon'rnomiiiie THE rnnn or 'easonrivn ENGINES.

Application filed March 30, 1926." Serial No. 98,423. I

In the, operation of gasoline farm engines it is the practice, especially in cold weather, to open upthe gasoline valve in starting so that a very rich mixture of gasoline and air is fed into the cylinder. As it is necessary, after starting, to continue to supply a fairly rich mixture until the engine warms up to its runthe engineso that, in starting, gasoline will be fed to the engine. at a maximum rate,

'giving a rich mixture, and so that, as the engine warms up, the rate of gasoline'ij'eed will be reduced until, when the engine reaches its running temperature, the feed of gasoline will be reduced to the rate desired for such running temperature. I

The object is accomplished by the means shown in "the accompanying drawings, which represent a preferred embodiment of my invention, and wherein Fig. 1 is a side view, partly in section, oi. the enginecylinder, the water jacket and hopper, the feeding means, and the feed regulating means. Fig. 2 is a detail view of the means. 1

The cylinder a contains a piston Z) and is surrounded by a water jacket 0 fed from a water hopper cl. The cylinder is provided with the usual spring-actuated intakervalve f and discharge valve I A known type 0t; mixing or generating valve structure is shown in Fig. 2. The casing m encloses a mixing chamber and has an outlet for the gasoline and air mixture feeding communicating'with the passage 9 to the 1 a port communicating with a gasoline inta te passage Thepassage his formed in' an extension from the casing, n which extension is also" formed an orifice that receives a needle valve 17.. 'Valve it also extends through packing p and a packing nut 0. The stem threaded on the cndto receive a'nut 1", be tween whichand nut oisconiined a spring 8. i

In my invention the adj'usti'nen't of. the needle valve is such that it will open,'when the spring is allowed to expand toits maximum extent, to allow a maximum feed of gasoline, so as to give a supply s'ufiicient to startthe engine when 'c'old; v

A bushing 25 is screwedintoone side of the water hopper. Secured 4 to this bushing and extending through the interior of the water hopper is a brass tube" 1) having aclo sed' end u. Secured to the closed end ofthe brass tube 1) isa nickel steel rod 10, which extends through and beyond the open end of the tube movement, inthe direction of the arrow, of

rod o is,'through adjusting nut 00, trans; mittedto lever y, which in turn inovesneedle valve n inward, that is, in the direction 're-' quired to throttle the gasoline passage. 1

The coeiiici'ent or expansion of brass is of valve a projects beyondnut 0 and is .0000105. The coefiicient of expansion oft 36% nickel steelis .0000004. The difference in expansion is therefore .0000101.

If it be assumed that ten inches of the brass tube e is exposed in the body otwater and that. the variation in temperature of the water is from 42, F. in cold weather to a running temperatureof"212"F. (or 170 F.

variation), the differential motion ofrod to; will be .017 inch. I

"If it be assumed that the ratio of the two arms of the lever'y be 1]: 2, then the motion of the needle valve a, due to the described thermostatic couple, will be034 inchfwhich is'ample for all needs.

The adjustment. is such that when the tube and rod are cool and contracted, the lower end of lever y is positioned to allow the needle valve to open to the full extent reline m xture SllltflblQfOlf running cond tion quired for starting thereby giving-a mixture rich in gasoline; As the temperature of the Water"r1ses, both the brass tube '0; and the nickel steel rodv w expand in length, but the eXpansionIof rod 4/) beingrelatively slight, its free'end Will'move in thedirection oi -i he arrow, and nutw, engaging lever y, will swing v the lever so as topush' in't'heneedle valve and gradually throttle the gasoline admission passage, until, When the'water' is raised in temperature to the hoiling point, the needle valve throttles the gasoline passage to the degree "adapted to 'yield the' desired lean ga oer the'engine is shut dovvn and: ti 7 Wa' fr fools,'theibrasstubein \vaterhopper contractsto a greater degree than the nickel steel rod,there by causing a moven'ient oi; admstiing' nut w OPPOSlCGtO that indicated thearrow. *Nut 00 therefore recedes from lever y,"'and spring 3, not being restrained by lever g], opens the needle valve to thefdegree requ ljledfto supply s'ufiicient gasoline when the "engine is restarted? Afterthe engine is re-started, and the Water h oppei'wva 'ms up,

' the reverse action takes place, as above described, and the needle valve is g fla c lually the boiling poin closed until thje watjerin the hopper reaches Thegasoline c'ontrol valve therefore reg quires no manual 'ad ustment,

, Q While I hav'e descrihi d he tube as composed of brass and the rod composed: of nickel Ste 1 two materials having; substantially clifierent coelficients of, expansion \vill'he operative. For steel. and,

rd: fi b' "m k i, m ei' nb b Alum num and glass, or-hard rubber and wood, areexa'mples of othei* practicahie m hin'a'tions. It is obvious, also, that the rod may have a higher coeflicient of expansion than the tube; andgthat sucha construction wvolil d be operative if accompaniedby ob 'broadeste hodimenhas such claims are set forthinlan' fi led of evenjdate herewith, Serial il l o."9 8,424;

. Havlngnoiv fully descrihed myinvention, whatl claim and-desire to protect by Letters Patent is 1. I n an internal combustion engine, the comb nation w th an engine cyl nder, a cham beriada ptedto contain ater and maintain a water jacket aronnd; the cyl nder, means p roviding a passage for admission of gasoline to the engi-ne,ia'nd a movable Valye governing therate of gasoline inflo\v, of a tube extending in the direction of extension or the cylinder. and throughout the major partof the length creamer-lumber saidtuhe heir-1 o en at oneiend and closed at the other, the open end of the tuhee'Xte-ndmg' 1I1t0 an or1fice 1n 7 the chamber Wall and being supportedby said Wall, its 'closed end being unsupported, a rod having av coeificient of expansion di' fi-o ntliat ofthe tub e and one e nd of secured tolthe closed end-oat Tthe t b which extends throughout the lens tube and beyond its open mm changesf'in the water thereforeetie in longitudinal movement of one end of i p with the closedend off the tuh ewvhile the other 7, end of the rod has a' longitudinal movenient relative to the open end of the tube, and means, actuahlehy the rod in its longitudinal movement, adapted to'control the position of the valve to effect a closing movement of the valve as the Water Warins and: an opening movement of thevalve asthe vvater cools.

2. In an internal. combustion engine,- the combination "with an engine cylinder, a i ber adapted to contain ater-and maintama Water aclret around the cylin der, means pro Viding a passagefioi admission of gasoline to the engine, and a niovahle. valve governing the rate of gasoline inflow, offa tube extending in the direction of-extension ofthe cylinder and throughout the n'iajor part of the length o f said chamber, tuhe being open at one end and clos'ed'atv the other, the open end of the tube extending into ans orifice in the chamber Wall and being supported by said Wall, its closed end being unsupportecha rod having a coefficient o'j't'yexpansion substantially less than thatflof the tribe and one end of, which is secured to the closed end 01 the tube and which extends th n ghout the length of the tube and heyono its openend 'teniperature changes in the Watertherei' ore eitl'ecti a longitudinalexpansion and contract on, V

the tube, thereby bodily pulling the Wardly in the tube in thelattefls expansion "and bodily pushing the rod outwardly in the tube in the lattefis contraCftion and means, actuable by the rod in its said bodily moi nients, adapted 'to control the'position ofth'e valve to effect a closing movement ojfthe valve as the water'xvarms and; an opening movement oft-he valve as the water. cools; V a In testimony of which invention l have hereunto set my hand," at New Y ork,'on this 18thdayoflFebruary, 1926;

CYR .nowa n m eoon. 

